Ordering process

Aaaand here it is - my first shot on Dribbble :)

I've created this illustration of ordering process for a car service web page. It describes a process from step 1 - "order of service" to step 4 - "pick up keys from a client's car". Underneath the icons there's a slider for unveiling the process - this should be a nice interaction between the user and the actual web site.

So, what do you think in terms of the overall design and UX?

BTW - You can see the whole website here: https://www.behance.net/gallery/Juricekserviseu-redesign/14251507